Fix notes_data so the initial value is in microseconds

Without this change, we always start polling for updated notes far back
in time, as the value is interpreted as microseconds, instead of
seconds, now.

app/helpers/notes_helper.rb

@@ -181,7 +181,7 @@ module NotesHelper
       reopenPath: reopen_issuable_path(issuable),
       notesPath: notes_url,
       prerenderedNotesCount: issuable.capped_notes_count(MAX_PRERENDERED_NOTES),
-      lastFetchedAt: Time.now.to_i
+      lastFetchedAt: Time.now.to_i * ::Gitlab::UpdatedNotesPaginator::MICROSECOND
     }
 
     if issuable.is_a?(MergeRequest)

changelogs/unreleased/209784-fix-notes-pagination-values.yml

+---
+title: Use the correct start time when polling for updated notes
+merge_request: 42124
+author:
+type: fixed